33401807920 has 80 divisors (see below), whose sum is σ = 86516962560. Its totient is φ = 11907689472.

The previous prime is 33401807917. The next prime is 33401807939. The reversal of 33401807920 is 2970810433.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×33401807920² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33401807920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523584 + ... + 583903.

It is an arithmetic number, because the mean of its divisors is an integer number (1081462032).

Almost surely, 2^33401807920 is an apocalyptic number.

It is an amenable number.

33401807920 is an abundant number, since it is smaller than the sum of its proper divisors (53115154640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33401807920 is a wasteful number, since it uses less digits than its factorization.

33401807920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107542 (or 1107536 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 33401807920 in words is "thirty-three billion, four hundred one million, eight hundred seven thousand, nine hundred twenty".